Hexanchus nakamurai Teng, 1962

Bigeye sixgill shark

Catalog of Fishes (gen., sp.) | ITIS | CoL

Classification	Elasmobranchii \| Hexanchiformes \| Hexanchidae
Synonyms	Hexanchus griseus nakamurai, Hexanchus vitulus, ... more
Common names	Bigeyed sixgill shark, Six-gill shark, Griset, ... more

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Image of Hexanchus nakamurai (Bigeye sixgill shark)

Picture by Justine, J.-L.

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This map was computer-generated and has not yet been reviewed.

AquaMaps Data sources: GBIF OBIS

Main reference

Last, P.R. and J.D. Stevens. 1994. (Ref. 6871)
Other references | Biblio | Coordinator : Compagno, Leonard J.V. | Collaborators

Size / Weight / Age

Max length : 180 cm TL male/unsexed; (Ref. 247); common length : 120 cm TL male/unsexed; (Ref. 5217)

Environment

Bathydemersal; marine; depth range 0 - 600 m (Ref. 5578), usually 90 - 600 m (Ref. 6874)

Climate / Range

Deep-water; 49°N - 35°S, 99°W - 161°E (Ref. 55216)

Western Central Atlantic: Mexico (Ref. 13186), off Bahamas, northern Cuba, Nicaragua and Costa Rica. Eastern Atlantic: France to Morocco, including Mediterranean Sea (Ref. 13573); possibly Côte d'Ivoire and Nigeria. Indian Ocean: off eastern and southern Africa (Ref. 13573), Aldabra Island (India); Western Australia (Ref. 6871). Western Pacific: Japan, Taiwan, Philippines, New Caledonia and eastern Australia (Ref. 13573).
Countries | FAO areas | Ecosystems | Occurrences | Introductions

Short description

Dorsal spines (total): 0; Anal spines: 0; Vertebrae: 155. A small, slim, six-gilled cowshark, with a narrow head and large eyes (Ref. 5578). Snout bluntly pointed, body fusiform (Ref. 6871). Dorsal fin relatively small, origin varying from over posterior half of pelvic fin base to just behind pelvic fin insertion (Ref. 6871). Anal fin smaller than dorsal fin (Ref. 6871). Live specimens with fluorescent green eyes (Ref. 6871). Brownish grey dorsally, paler ventrally (Ref. 6871). Fins with white trailing edges (Ref. 6574).

Found on continental and insular shelves and upper slopes, from 90 to 600 m depth, usually on or near bottom, may move to the surface at night (Ref. 247, 5578). Probably feeds on bony fish and crustaceans (Ref. 13573). Ovoviviparous (Ref. 205), with 13 young in a litter (Ref. 247). Not dangerous to people as far as is known (Ref. 247). Utilised for its fins, meat and liver oil but of little value due to its relatively small size (Ref.58048).


IUCN Red List Status (Ref. 57073)	Threat to humans
Not Evaluated	Harmless (Ref. 247)

Human uses
Fisheries: subsistence fisheries


More information
Countries FAO areas Ecosystems Occurrences Introductions Ecology Diet Food items Food consumption Ration	Common names Synonyms Metabolism Predators Ecotoxicology Reproduction Maturity Spawning Eggs Egg development	Age/Size Growth Length-weight Length-length Length-frequencies Morphometrics Morphology Larvae Larval dynamics Recruitment	Other references Biblio Aquaculture Aquaculture profile Strains Genetics Allele frequencies Heritability Diseases Processing	Collaborators Pictures Stamps Sounds Ciguatera Speed Swim. type Gill area Otoliths Brains Vision

Tools
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Special reports
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Summary page \| Point data \| Common names \| Photos

Internet sources

Estimation of some characteristics with mathematical models

Resilience (Ref. 69278)

Very Low, minimum population doubling time more than 14 years (Fec = 13)


Vulnerability (Ref. 59153)	Price category (Ref. 80766)
Very high vulnerability (81 of 100)	Not marketed/unknown

Entered by Carpenter, Kent E.

Modified by Wiethüchter, Anita

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Page last modified by : elaxamana, 15 July 2009

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